sriharsha4444
Can GMATNinja or ChiranjeevSingh or Anish Passi take a stab at this one please ?
Let's start by breaking down the passage:
- Conclusion: That "the implication of these studies is that the great apes have a capacity for self-awareness unique among nonhuman species."
- Supporting Evidence #1: "Most animals exposed to a mirror respond only with social behavior."
- Supporting evidence #2: In the case of great apes "repeated exposure to a mirror leads to self-directed behaviors... suggesting these animals recognize the reflection as an image of self."
Overall, the argument is based on certain studies, which themselves took Gallup's work as a model. Since these studies suggest that great apes are unique in their capacity for MSR, the argument concludes that great apes are unique in their capacity for self-awareness.
Here's choice (A):
Quote:
The cognitive scientist makes which of the following assumptions in the argument above?
A. Gallup's work has established that the great apes have a capacity for MSR unique among nonhuman species.
The conclusion is based on studies which used Gallup's work as a model. However, the conclusion is not directly based on Gallup's research
itself, so we don't need to make any assumptions about what Gallup's work has or has not established.
Eliminate (A).
Quote:
B. If an animal does not have the capacity for MSR, it does not have the capacity for self-awareness.
The argument concludes that "the great apes have a capacity for self-awareness
unique among nonhuman species." It supports this statement with the fact that great apes show MSR. But how do we know their capacity for self-awareness is
unique?
Well, the argument suggests that other animals lack self-awareness because they lack MSR. For this logic to hold, we need to assume that if an animal doesn't have the capacity for MSR, it doesn't have the capacity for self-awareness. In other words, we need to assume what answer choice (B) says. If that weren't assumed, and animals could have self-awareness
without MSR, we couldn't conclude that great apes alone have the capacity for self-awareness.
Since (B) is necessary for the argument to succeed, it's an assumption made by the argument. Hold on to (B).
Quote:
C. If a researcher exposes an animal to a mirror and that animal exhibits social behavior, that animal is incapable of being self-aware.
The argument assumes that if an animal lacks MSR, it lacks self-awareness. But it does NOT assume that just because an animal exhibits social behavior it
lacks self-awareness. Maybe some animals exhibits social behavior
and MSR? If that were the case, an animal could display both social behavior
and self-awareness, according to the premises of the passage.
Since (C) is not assumed by the argument, we can eliminate it.
Quote:
D. When exposed to a mirror, all animals display either social behavior or self-directed behavior.
Do we need to assume this? Not really. Even if some animals displayed neither social behavior nor self-directed behavior, that wouldn't damage the idea that the great apes are unique in their capacity for MSR, and that this implies they are unique in their capacity for self-awareness.
Eliminate (D).
Quote:
E. Animals that do not exhibit MSR may demonstrate a capacity for self-awareness in other ways.
If this were true, it would actually weaken the argument. The cognitive scientist assumes that if an animal does not exhibit MSR, it lacks the capacity for self-awareness. So if animals could fail to exhibit MSR, but still demonstrate a capacity for self-awareness, the argument that great apes are "unique" in their capacity for self-awareness would be damaged.
Since (E) weakens the argument, it's definitely not an assumption. Eliminate (E).
That's leaves us with (B), the correct answer.
I hope that helps!